Altaïr Ibn-La'Ahad + Éomer, Marshal of Rohan + Gogo, Mysterious Mime + Leyline of Transformation

Prerequisites

• An opponent cannot block and kill Altaïr or Gogo.

Steps

1. 1At the beginning of your combat phase, Gogo triggers, causing it to become a copy of Altaïr with its name not changing, and causing both Gogo and Altaïr to get +2/+0 and haste until end of turn.
2. 2Declare Gogo and Altaïr as attackers, triggering their abilities.
3. 3Resolve the Altaïr trigger, exiling Éomer from your graveyard with a memory counter on it and creating a tapped and attacking copy of Éomer.
4. 4Resolve the Godo trigger, creating a tapped and attacking copy of Éomer.
5. 5Put either Éomer token into your graveyard due to the legend rule, triggering the other Éomer token, causing you to untap all creatures you control and to get an additional combat phase after this one.
6. 6At the end of your combat phase, Altaïr triggers, causing you to exile the Éomer token.
7. 7Repeat from step 2 each combat phase.

Effects

• Infinite combat phases
• Infinite creature ETB
• Infinite creature LTB
• Infinite death triggers
• Infinite mana creatures you control can produce
• Infinite untap of creatures you control